The figure you redraw four times
Once for the group meeting, once for the draft, once for the journal, once for the talk. Here is how to draw it once.
What a reviewer means by “the statistics are unclear”
Usually not that the test is wrong. Usually that they cannot tell what was compared with what, and how many times.
A calibration curve is not a result
It is a claim about your instrument. Worth saying out loud, because it changes where it belongs in the paper.